Like Karlos said, there’s different kinds of lies. Wyliman would never lie to her to trick her into being with him. Heck, his the first one suprised someone like her wants to be with someone like him, so might as well keep the show running the way it was, which is honest. But in this case, he could have destroyed Nadia in one second, but what would that accomplish? All I can think of is a smug sense of supriority that would only bring pain to everyone there. He didn’t lie to benefit him (considering he had the upper hand), he lied to benefit them.